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community located approximately two miles northwest of the city. Below this junction point, the combined Wild Horse-Dry Creek stream channel passes under the City of Pueblo's northwest residential area before draining into the Arkansas River. The headwaters are fed from snowmelt and rainfall runoff during late fall, winter, and early spring. During the summer months, the flows are the result of thunderstorms or general rains over the entire watershed. The scrub vegetation growing in the higher elevations is typical of southern Colorado's foothill regions where fairly rough, broken terrain usually prevails. At lower elevations, the creeks traverse high plains covered wi th sparse vegetation of semi-arid type. Sage brush, cactus, and native grass dominate this area. The average slope in the watershed is approximately 60 feet per mile and, within the study reach, 37 feet per mile. Streambed elevations vary from approximately 4,670 feet at the mouth to 4,877 feet at the upper limit of the study reach (Reference 5). The banana-shaped watershed of Dry Creek spans a distance of 5.5 miles from the mouth to the headwaters with a maximum width of 1.3 miles. The drainage area is 5.4 square miles. Elevations in the watershed vary from 5,265 feet at the headwaters to 4,608 feet at the Arkansas River confluence. An ephemeral stream, Dry Creek originates at the southern extremity of Baculite Mesa in the high plains northeast of Pueblo and flows southerly to discharge into the Arkansas River within the City of Pueblo. The creek flows are the result of snowmelt and rainfall runoff during the winter and early spring. During the summer months, the flows resul t from thunderstorms or general rains over the entire watershed. The rolling high plains terrain is fairly rough, broken and sparsely vegetated. The vegetation consists of sage brush, cactus, and native grass, typical of the semi-arid high plains region. Floods in the study reach normally originate from runoff of the entire watershed due to limited areal extent of the drainage. The steep slopes and long narrow shape of the drainage are conducive to fast rises and high peak flows of short duration. The average slope of the watershed is approximately 114 feet per mile. Within the study reach, the average slope is only 49 feet per mile (Reference 5) . Goodnight Arroyo originates on the high plains southwest of the City of Pueblo. The triangular-shaped watershed spans a distance of 4.9 miles from the headwaters to the mouth. It has a maximum width of 2.9 miles and drainage area of 5.9 square miles. Elevations in the watershed vary from 5,330 feet at the headwaters to 4,708 feet at the Arkansas River confluence. 6